Here is one of the nifty things you may use fft filtering for. The laser scanning confocal microscope scans along the X axis. If there is noise in the laser, then this shows up most dramatically in adjacent X axis scans. Filtering the frequency of the alternating X axis intensities cleans up the image.![]()
The Image Processing Toolkit also does this in Photoshop.
Example contributed by Michael Cammer, Analytical Imaging Facility, Albert Einstein College of Medicine.